Smoke-consuming device



Feb. 24, 1931. w. BROWN SMOKE CONSUMING DEVICE Filed May 5, 1926 2 Sheets-Sheet l JIIIIIJIIIIIIII,

Liam EFUwT-L Feb. 24, 1931 w, BROWN 1,794,101

SMOKE CONSUMING DEVICE Filed may a, 1926 2 Sheets-Sheet 2 Patented Feb. 24, 1931 res WILLIAM snown, or GLASGOW, SCOTLAND SMOKE-CONSUMING DEVICE Application filed. May 3, 1926, Serial No. 106,505, ant l'in Great Britain February 26, 1926.

This invention relates to method of consuming smoke and to apparatus for carrying out thismethod; the method and apparatus not only enabling the smoke to be consumed but also enabling the waste products of combustion to be utilized.

After considerable experimental work I have discovered that smoke can be consumed:

by a method in which a pipe or passage having means for providing a flame to pro ect thereinto and for providing a stream of gas winch will support combustion are used to receivethe smoke or products of combustion from the furnace (hereinafter referred to, merely as smoke) and to consume the smokea prior to discharge.

' hollow member forming a passage'having an Apparatus for effecting this comprises a inlet for theysmoke at one end thereof and having an outlet at the otherendthereof,

means for producing a flame toproject into the said hollo'wmember and means for-supplying a gas which will support combustion within the hollow member. 1

The hollow member forming the passage for the smoke may extend through the water space in the case of a boiler or it may be otherwise arrangedthat the heat from the combustion of the smokeis utilized.

This invention is particularly applicable to boilers for'generating steam and in its application Ito such the-hollow member extends from the smoke box through the water space and has an inlet for smoke at the smoke box end and an outlet at the other end while the means for projecting the flame and for supplying a stream of gas which will support combustion to the hollow member are provided as before and the wholeis so arranged that the smoke is consumed and the heat generated thereby'is utilized prior to its discharge from the hollow member. It'is important that the stream of gas to support combustion in the hollow member will take up and propagate'the flame substantially throughoutthe length and breadth of the hollow member.

In order thatthe nature of the invention may be clearly understood. the applicationjof this apparatus to boilers for generating steam will now be described, simply by way of example, with reference to the accompanying drawings, wherein Fig. 1 is a sectional elevation of a boiler arranged for consuming the smoke and utilizing the heat generated thereby.

1 Figs. 2 and 3 are side sectional elevation and end elevation respectively of an alterna tive form of such apparatus. Likereference numerals indicate similar. parts throughout smoke box is open and the opposite end which projects from the boiler is provided'with a dischargepassage or pipe 1 which in the case ofsta-tionary boilers may lead to the chimney.

A pipe unction t having a gas burner 5 and also having a nozzle 6 arranged as shown,

.with an open l for lighting the burner is provided in a position centrally of. the smoke box end of the consuming plpe. The gas burner is preferably connected with asupply of coal gas and the nozzle is connected by the pipe 7 to a blower 8. adapted to supply air under pressure; the arrangement being such that the air tends to project a flame fromthe burner within the consuming pipe: The blower also serves to supply a forced draught to the fire, a pipe 10 (hereinafter called the forced draught pipe) beingprovide'd extend ing into the ash box of the furnace in a position beneath the firebars. This pipe may be provided with a separate angle piece llon its end adapted to direct the forced draught upwardly and inthis case it is advisable to arrange that this angle piece 11 is rotatable and has means such. as. the hand wheel 12 disposed exteriorly of'the ash box'for rotating it so as to enable any ash which may fall therein and tend tochoke the pipe to be removed; A valve-such asthat marked'l3 is also provided for controlling the flow of air passes upwardly as indicated by thearrows' through the flue 17 into the smoke box 2 and from there passes'through the open endl of the consuming pipe 1 in which it is burntv up. Any waste gases escape by the discharge pipe 1.

It will be seen that the smoke is burnt up by the combined action-of the air andflame which isp'ropagated throughout substantially the whole length and breadth of the consuming pipe and itis found'that withproper regulation of the supplies of air and gas and ofthe smoke that it is possible entirely to consume thesmoke. The flame must ac t'on all the smoke passing throughthepipe and it'must act upon it for a period sufficient to ensure its complete combustion.

may be consumed by arranging that part of the smoke is passed to the fire in the'furnace and part to the consuming pipe.

A boiler having apparatus" designed to effect this is shown. in Figs. 2 and 3 in which the consuming pipe 20 is arranged as before except that the position of the outlet and the pipejunction for supplying gas and air are reversed, the pipe junction 21 for supplying coal gas and air (which is similar in'construction to'that shown in Fig.1) being in this case arranged at theend which projects from the boiler and the outIet-QObbeing pirovided at the smoke box end. In this ea'sealso a transfer pipe 221s provided extending between the smoke box 23 and the forced draught pipe 10, this serving to convey the smoke from the smoke box down through the forced draught pipe and to direct it upwardly beneath the furnace. A further transfer pipe 1 filet'is provided having an inlet 25 immediately above the outlet of the forced draught pipe in the ash bo'x,'said transfer pipe extending upwardly and having an outlet 26' communicatingwitlr'the consuming pipeat or near theend which is provided with the gas and air fitment. This transfer pipe' from the ash box is preferably pr'ovidedwvit-hh' control valve '27 and is arrangedthat'part of the smoke together with air fromthe blower is passed upwardly through the and apart eii f' i hrou t st ieee r r 'tl ens m he' t r sthe'am "1 61a an. h reusferriiieazfdf .equ. p; .s n'e'jt ii-ioi gh 7 As an alternative to the above the smoke the valve in the transfer passage. Thus by operating the valve 27 the relative amount of smoke and air supplied to the pipe 20 can be regulated as in the construction described with reference to Fig. 1. In this case the smoke will be consumed in the pipe as before.

It will be understood that in both cases the ash box and respective passages for the smoke or air must be substantially air tight.

Moreover the consuming pipe projects through the water space of the boiler so that the heat caused by burning the smoke is utilized to. heat the water and thereby increase the efficiency of the boiler.

In the exemplary construction described and illustrated coal gas is used to produce the am b t will be u 'de stqofd th t a y other means my' e provided for attaining this end, for instance, .oil' fuel, particularly where 'oil is used as fuel for'the furnace,and also an electric are similar to thatin the well known electric are'inetallurg'ical'furnaces; Further, although" a' i1{' (being the he e t a d m s n enient as P rt he 'e fibustihlj 's ere rably'use a y whe eas k ew' i' f Street-1t mbus may b e rlp W' N e S ope Qf h .g: Z1 i I. t, I p

Having now fully described my invention what I 'cla nace, a smoke box communicating with said fiirn c new m mber halv g iiilet n and des e ee r by et communicating with said smoke box and an outlet external yofS aid smoke box, a, burner acenttheinlet en dofs id h ll'oy member and a dapt'ed" to produce; a"flan'ie', means for pr vid ng a pp y i 'eo'ili l ti n r rp inggas underpressur ;fafconduit for said ga i -aid ng. fr' Said mean 116 'ii'ei t ben at i anent of the aforesaid'firsta id second eondui nd he; al enali a h relativ 11 61 1 smek eedi e i i r ed e 39. 12 149 lqyyfinember tofbereg ulated'. a

. ep efet s' rats feme e sausa e em nate fe nace; "a smoke liqx with, said ere ee an e. ieh ash be; or sai t n a; mut b r jror iia gj ea. Qiitlet. or th .box a 'rdl-arg outs inia melie 3mm.-

exam inlet ply of combustion-supporting gas under pressure, a conduit for said gas leading from said means to said ash box for supplying a forced draught for the furnace, a Valve for said 0011- duit, a second conduit branching from said first conduit and positioned intermediate said means and said valve, said second conduit leading to a nozzle adjacent the burner, the gas flow from the nozzle being adapted to direct the burner flame into the hollow member, and the arrangement of the aforesaid first and second conduits and the Valve enabling the relative amounts of smoke and gas supplied to the hollow member to be regulated.

In testimony whereof I aifix my signature.

WILLIAM BROWN. 

